Amplifier Experience Gryphon Pass Lamm BAT

After living with a small integrated amp for quite some time (Pathos) I am finally about to take the plunge and buy myself a large power amplifier with a matching preamp. (Speakers are WB Chimeras)

I am focussed mostly on class A amps amd prefer a neutral sound erring on the warm side. After having lived with Pathos for a while I am looking for someting more powerful than most tube amps.

The brands and models I have narrowed it down to are:
- BAT VK52SE+ 2x BAT VK600
- Pass Labs XP-20 + XA160.5 Monos
- Lamm L2 Reference + Lamm M1.2 Reference Monos
- Gryphon Mirage + Antileon Signature Stereo

All models are used or ex-demo equipment I could get a good price on hence if some manufacturers (Krell, mbl etc.) are not included this is because there is either no opportunity or I excluded them for some other reason.

The above are listed according to price I could get them at with the BAT being quite a bit cheaper and the other three being quite close.

I will not be able to compare any of the above in the same room, etc so I would be grateful for any direct experience people have in comparing the above!